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Expired European patentEurope

Process for the production of neodym alloys

EP 0272250 B1 · Applicant: RHONE-POULENC CHIMIE

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Overview

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Listed from its EPO record in Patent Yard's archive of European patents past their term. Its claims, description and drawings are in the EPO PDF and on Google Patents, and the Claude kit works from them.

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Why it's free to use

  • Filed June 22, 1984 and granted September 30, 1992. A European patent lasts at most 20 years from filing, so its term ended June 22, 2004.
  • A supplementary protection certificate, which can extend a medicine or crop-protection patent, adds at most five and a half years, so even that would have ended by December 22, 2009.
  • We check European rights only. A US or other national patent in its family could still be in force: check its family on Espacenet or Google Patents.
FiledJune 22, 1984
PublishedJune 22, 1988
GrantedSeptember 30, 1992
Term endedJune 22, 2004
Application numberEP 88100014
Classification (CPC)C22B59/00 +2 more

Timeline

Timeline From EPO dates

1985198719891991199319951997199920012003Application filedJune 22, 1984PublishedJune 22, 1988Patent grantedSep 30, 1992Term endedJune 22, 2004

Sources & verification

Official EPO records

Full published documentClaims, description and drawings as a PDF.EPOEuropean Patent RegisterProcedure, status, file inspection and legal events.EPOLinked open EP data recordThe bibliographic record this page is built from.EPO

Cross-check elsewhere

Google PatentsFull text, worldwide family, citing patents and legal events.patents.google.comEspacenetNational family members and their legal status.European Patent Office

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